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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2bb92510c667fed6963645ca3d63fa86503e4b29b18498d00e8418832d905f4a' 
  AND token = 'Zc3rSS7LN9beFZ0qhiIqOGjegXxNfWCTX/yUFHWuFAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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