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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ea6c5ff322073ba5070cf81c4e795e8156508b7bba2a372afe5178bfd2125a65' 
  AND token = 'MWZJX4VX1hIJmXKJZjY7E04R/Fcmq5eT1cCRQi8jLxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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