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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22c7186281beb1ec5ee1e6f6dab2120371328e0b90b2ab1f58c3408096116158' 
  AND token = 'AUyhysell0ySEp6/c9VJBiFVO5gJ9gW0+bR0syqr7Os=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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