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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'c3062f9d7c22bcbeee4e40b84179cfe1f202bf7f9402599e8a2434da96a12c05' 
  AND token = 'vToyNqAnyfctEv5klOr2GQYgA/jegdAC8392hNi/dfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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