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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '0ae4df12b4f367ec7a97da8a769b2ea406b416d0092fd0536ffa0eded0092ce0' 
  AND token = '74uEFBA8YaF0PYuMDRFBWg8+uxiC09NG72o7ntu9Igc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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