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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '13045f3431ca55803f397704b4d04c0f8dbb400d73b9bb54aa4c6f8537b9d006' 
  AND token = 'bioStwxDo2iqzsDDQDSMh4NNgkfcH9vJXxD2E9HsooY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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