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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01a1254085393e4de2a8815ae7a8184d711779b8e83f3d5a8839b7fb53cc4ef9' 
  AND token = 'oXR4o0Cma55bvKR3JRixBQtCBYJb+Oks90ug8ZUL0jY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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