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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'fb08bdfec7499c04f49f375cc970f8d505aa8530a3b7114c159a48aa6dcddef1' 
  AND token = 'oR7n9pPXlm3SZaS+kgJ3j26+QOGnlF9r9DS+FEh91Kk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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