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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e33ae368abb617bc37ac9a057b612d1d1eb7d972525fc58848e8f2b8f6901487' 
  AND token = 'jpsVims0kRUFO4d5PG/hRPzf799iR1DrX3z8O0PEBAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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