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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e9762efd6dbaf57508533f936ee11c268940aeb1e32831db4d241e3dd7e5991' 
  AND token = 'lON7ZIH4L4SOFDFWzlNNdpH2pYzqU+fCCz/AY8Gxx5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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