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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'fcea96520668fe2964b6e6ef9821f0ebb0824f73b5d2d5c0782248410697c058' 
  AND token = 'AWjuW7GVRw6bo6Gs5noRliCg5EXwt/7Kqb1O15XVS9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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