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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3e499a60580c1aa4f242fc62a176810c8e32599ca6242004e03c414e75891167' 
  AND token = 'umeEBAY0gjntR1SLgZlfU9Uq56GrkiE6YT5Z55RfHWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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