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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '896981535356bb4ec267519c3d75b803e95cb82160fd2665625eeea94d228f9e' 
  AND token = '1Eq8+ajXI1rjzyj3EMVev+Z+jWYntUiuaK1PaQ2zoEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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