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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '0e76507ae14a77a2d5145ae2068343b9ce946540ddab49e61939a1f2c610f11f' 
  AND token = 'SVITHdA/pRHfbxp88erIY98xJwArLyb6T5t5RYErK+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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