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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f2663a2ba42e55d8224ac2f5e71ff97b659e22e0b5a7b723b37bccbbfafbd8fe' 
  AND token = 'G2blW3/88SBknIXtJ5SvgB8JlgERufaZB8acquHoakA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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