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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0eb642a8e57cdc89a30eb85e7ac49b9b1e5d8ec6873d8676e785258c05cea73c' 
  AND token = 'CoopH6cjvQ2wKZPOCpLlV/YE2eNvNyt/Usk/hWWJ2Jk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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