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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efded87a379bd275f8fa3a5e3a7c7604b953898fa19063983c544f09ed6859e0' 
  AND token = 'DVLDRJgfYqlIuxktLnOtD+FhQfzxngxEp8h4YG24n58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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