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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5ceb2c9d54bd7a1c12bb5a3b62541a110b79755fc0af2ba538c9d7a496a6ad0a' 
  AND token = '5qNKpLw3nnsOOLsZ2g3mN4eqnBPc+eKmeKu45WoT2M4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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