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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '04ffa7b284dc37fda0600cec5acca44cbbe64e2ca63505ce6e6d4867bdc69166' 
  AND token = 'N/99+ETCVP9Q/rrXHvTgWSf1XXfBWBYdL9w4slv4pdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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