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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32faff74e2c007feedd0ae5d7248e71a03aed724c95a1aa8b49a39c7203a7929' 
  AND token = 'tsKwhjxaYH4oUkgImN1vpT2tJnSH6/VHQBrMf6gIJBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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