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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64a6c88484b86e14e6960161dfef5e74fbbe93b8aa9c7c3995e39a2fbeae6287' 
  AND token = '04tpHm3WEuq66RI7rXqy9TaQV5UZcywxj3yx+4R1YWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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