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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '465504b792c12c4d4a2a6d04e09f879ec3e26bc0682a2187f6e39ba1a5fc1753' 
  AND token = 'Ln3f7paGpsMFIljKkfxT1EK+Bk5nw9CUlXrPtCPfk94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}