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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'e034abd8c841d627d3e19772c6de9591e41ccf7f5cb3b3b4a9184539d34536df' 
  AND token = '12YlIy3SW2+24z6yqn8uarnwbKCehU141xo0C0bxHWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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