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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cd14d957dd07c031444ae3106a9ccf17f9bd895d2b104e01be6f4666fb46afc1' 
  AND token = '0hwTWoNOssCW54kPBBAIrqF6h0+p4O5SAbM1DowmnIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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