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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bef19ce9506e0b36b0c1214d73db311969709ab19071c20be10f49d6763f008e' 
  AND token = '8CtEr8Ga57vAPlUPXYCzFf994fuaEOAC7QOv+OpZKKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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