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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '59293233a777a474f8790719706a3a3aa94f23304cabfeb3f6420b0c27d97761' 
  AND token = '7MxuZABwH5kbdV4Mjy5fmkugvs1Jv9e9BKMInriSkBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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