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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9aba985fa33eab2db41220f21c30bd7dd839538689f246d5256dca9d945f4ae' 
  AND token = 'YZSPGSMZLaMBJZC/0226R39S/inES7fLHZEG1H20lr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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