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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b74ed9e91738e3fee88af269713f9e935182782bb65335f20ad527f5876b447f' 
  AND token = 'pK96MSCLVPoyu0gxEBULpEgpNd9080N4rg2B0t6h4ik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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