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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0c6209592005b8371d367e8f18ee669d1e103f036fc1cc0bbc90392eae666cc4' 
  AND token = 'Qha4MAiDoEkS9gMXUEXzq6VcQx6DoHct6U02cBn++mk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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