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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05ee236cee94417367a88c455f3c3b8fcac5fc860c5e3e65b3f019901f69e3b7' 
  AND token = 'PEvnIArQJfJInIqfDgc/Aum5PDCWUhhW+iyL11mvIBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00111

JSON explain

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