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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '80422e27a6bc513a9b2d00ecf2a3331675e9b80915f76a12448ea86fa5cb3b64' 
  AND token = 'fmdPcTZfr1MuX8s0eoAv1cXCvbh591GOrzwTEPz0p8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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