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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bdf13b4c8f681329676ba5e7a6b68877212586b975c4bce6f77e2babb593a71' 
  AND token = 'G+PWV1o18TjWHpO/8fM9mX7onbWg49VDGKnV/ZKae+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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