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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00edaaf9c07bd7bae412542a93d4b556c48e4056e3e6e8c15cd6e9fef697a992' 
  AND token = 'nmVe1K6EjyfkIXPW7mMsyS7C+19PqAa36NJ58DzHoLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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