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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07746aed89cb31ac57e53cebbd404d2bae0721c23d4c364049d8342e23d93838' 
  AND token = 'QsCuLsJtbx1V9XTM1IR6sImJiO6U5ZzthB5o6+573Po=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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