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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '14c9a45c75aa4be943dc6db06250aa2b9c36cade1d7b6ab78261a2b40dd8de3e' 
  AND token = 'm5gdHqd/UnhC3AV+8as1/84k2fOhDw8icqazxc01g24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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