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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ec25d0b5b695f1357adfd827c501e9808f2ee4577487aabf0a6db0a0b1b8ee8' 
  AND token = 'APLLVWlReIxwgxvrVbwTrbhqQVWb59sqMwH8Nzn/aNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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