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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07f758720cb824a2167ff599bd25d7320f7581c5c75b17272131b8cc3534f7eb' 
  AND token = 'angUWc1yAi8bpkweDKsntOltXb7Tqwk8IouHtNCqvO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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