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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2732c41eb0f70587bf16aa147cc14b5bfad0415a0fdd9a0055e724622e8e07c2' 
  AND token = 'lb4tFX1jCa+BX/HNPeEL1yVXhGBO2ZZT7mcsBp8Yyng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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