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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46a1898144b36c6901bda2085f86f540e737e4b1a74c3ffe755ef7c4a9a973b6' 
  AND token = 'TvEgF6NP2rqzxrueWSfMgL30PTdqjmSKk4UCUn/o3x8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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