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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'ce0ed5414038a3c46980d0529fd1e31465525baefffcabb6d22d686d8d0b6c09' 
  AND token = '/lSynrxF09TLO7S9Bvq0eejc3N8icwfUf+UEN78rLiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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