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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'de42d48e010cca0ad67ec81375f453434ff604c91856184385cf13c5723fcfdf' 
  AND token = 'CX5DvGikyJ92RHz83WX+J8P0Xd4+BtirynMBRCDSACM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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