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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8ee20caa2f0a61680df00cd34888e564f035c4257e81985c71495b1ef3e25353' 
  AND token = 'Fc9rGeyQQ8XIyN0MkR4eufjJL1CUEZhjOPbJW98bpno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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