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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '356b015e0d630c19378e26790ac9b294b055ddc54e3dd8c109597fed71d7bb19' 
  AND token = 'aUlc9exNFhKKTq53D6Oy0r0AYVGPR/hO6lcknL/oAbs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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