SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abffe7bf3389f7a52732bedf7fbb3dbbb3252b5d832ddcb113918dac49ea58ce' 
  AND token = 'r1iUG9oqZUwzaTLjSI+v4TRRCPvBZQt/cHzVZYM0z5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}