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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdcc804c9a867cb89cbbec0e3925ba59827cd24feeaaff2ba4f81935242857b1' 
  AND token = 'ryLviar2iIyqmorBWFHKH5ykob0+Ek+xoN9lI6fhLW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00115

JSON explain

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