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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95d5af073d85d07a2f8173fa0cffd9e2f0c1dd9851628922e7437e444bc68dd5' 
  AND token = 'vRZaEii8BrWAJjXuolabq/6OrS/XkA/IvkQa9odiFmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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