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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '8b656b47ddbbff4e6df4a683afd0d6b9f7729890e6c42bae23d464a1b372c7e8' 
  AND token = 'mLiiZSUxSsQIpkZi1613GoLvbuADmEmE024J4Jjnz3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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