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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8ea80eb48c0db049f0d3b0dc0b0adcdfb2d1db4ec273f605e1c57a7a734b2a9e' 
  AND token = 'ZpyL0vKv0Je8Zbs8+inq8Q06zA4S0A2wy5aB+yMQUBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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