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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '246530058f7857ccf989a8926fc0ac81f522703adefbac1607890d2f4b53db88' 
  AND token = 'Z8AAh+Z3p2YYxH+4AEq2yVkfFvymW5fqxMUB+2cS7bM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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