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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c8722882af5ae5605c523f512ae17f26a2d5e698866f4a7ffae10b16b89c509' 
  AND token = 'R+TFA+J8vlsVrHX0FQarNuSQMgxKV0P3RfHFo/8CXFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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