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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '106188ff4015d6cae2ecf2ec6f9bcb3c4c8fc9c3ec4a15c03e02fe956d5d0a3f' 
  AND token = '8lre5KBUWw8+vQwvh9xG8BIEKNLkaLlZpAoW3C4FAYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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