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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '41d0ac835fe4e1a0731b16b34afb0bd1b128fec4eb421415d6fd73c37daf48df' 
  AND token = 'OIVLPOKtKa2odMfvHCRMqSv5Wla6DF7lk0jR5Nfkpa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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