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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '75b4c90c78f53d38d178fb5a9a4108f80b0e6b122974c467220adc0f44f9fe09' 
  AND token = 'hCceO/ZDbj/TZbdKkHBKM+xj+/KeIa2OP7CFdMWi0sE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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