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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b2c8d39508c25b4ccdc3aac03523bb3ff2b05c64ff166dcdd7167307610fffc' 
  AND token = 'iqCpZAZNK/S3HgNY4lzbEpURydr8p3LPWVCvdxRTBq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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