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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '1d5ad4b63cfcc86d17c91acb4bcd777b2cf07643ec42c7f36d796683ffb53676' 
  AND token = 'ExoAFjkCj6dkjIQjaYKp5AP2uq3A3mSkF4jR0/4GPs8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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